An application of Water Quality Index (WQI) and multivariate statistics to evaluate the water quality around Maddhapara Granite Mining Industrial Area, Dinajpur, Bangladesh

Environmental Systems Research

Table 9 Calculated Water Quality Index and their classification of the samples

Sample	WQI	Water type	Sample	WQI	Water type
MRS-1	31.23008	Excellent	MRS-17	42.11095	Excellent
MRS-2	37.06531	Excellent	MRS-18	31.4552	Excellent
MRS-3	28.06065	Excellent	MDS-19	26.77772	Excellent
MRS-4	35.07572	Excellent	MDS-20	44.10005	Excellent
MRS-5	10.23388	Excellent	MDS-21	17.44005	Excellent
MRS-6	14.97247	Excellent	MDS-22	19.51724	Excellent
MRS-7	37.29106	Excellent	MDS-23	19.94317	Excellent
MRS-8	18.25328	Excellent	MDS-24	19.07301	Excellent
MRS-9	16.69171	Excellent	MDS-25	20.80748	Excellent
MRS-10	16.16417	Excellent	MDS-26	19.08683	Excellent
MRS-11	15.65285	Excellent	MDS-27	29.87894	Excellent
MRS-12	15.77154	Excellent	MDS-28	19.37103	Excellent
MRS-13	15.14981	Excellent	MDS-29	29.33892	Excellent
MRS-14	63.64195	Good	MDS-30	25.17631	Excellent
MRS-15	21.79876	Excellent	MDS-31	20.55718	Excellent
MRS-16	18.54043	Excellent